unit 1 lesson 3 how do scientists use tools? copyright © houghton mifflin harcourt publishing...
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Unit 1 Lesson 3 How Do Scientists Use Tools?
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Florida Benchmarks
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• SC.3.N.1.1 Raise questions about the natural world, investigate them individually and in teams through free exploration and systematic investigations, and generate appropriate …
• SC.3.N.1.2 Compare the observations made by different groups using the same tools and seek reasons to explain the differences across groups.
• SC.3.N.1.3 Keep records as appropriate, such as pictorial, written, or simple charts and graphs, of investigations conducted.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Make It Clear!
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• Scientists use magnifying tools to help them see small objects.
• Magnifying tools make things look larger.
• Magnifying tools include microscopes, hand lenses, and magnifying boxes.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Close, Closer, Closest!
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• A hand lens has one lens and a handle.
• To use a hand lens, hold the lens near your eye.
• Then, move the hand lens closer to the object until the object is sharp and in focus.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Close, Closer, Closest!
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• A magnifying box has a lens in its lid.
• You can use a magnifying box to study things that are hard to hold, such as bugs.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Close, Closer, Closest!
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• A microscope magnifies objects that are too tiny to be seen with the eye alone.
• Most microscopes have two lenses that work together.
• You can use microscopes to study very tiny objects.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Measure It!
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• Measuring uses numbers to describe the world around you.
• There are several ways to measure.
• There is more than one tool and unit for each way to measure.
Length, Mass, and Volume
• A balance measures mass.
• Mass is the amount of matter in an object.
• The basic unit of mass is the gram.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Length, Mass, and Volume
• A balance has two pans.
• Put the object you are studying in one pan.
• Add masses to the other pan until the pans are balanced.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Length, Mass, and Volume
• Measuring tapes and rulers measure length.
• The basic units of length are centimeters, meters, inches, and feet.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Length, Mass, and Volume
• Volume is the amount of space matter takes up.
• You can use a graduated cylinder, measuring cup, or spoon to measure the volume of a liquid.
• You can use these tools to measure the volume of a solid that can be poured, such as salt.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Length, Mass, and Volume
• You use numbers to report measurements and compare objects.
• You can also order things using measurements.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Time and Temperature
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Time
• Clocks and stopwatches are tools that measure time.
• The basic unit of time is the second. One minute is equal to 60 seconds. One hour is equal to 60 minutes.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Time
• These frogs are having a race. How could you use time to study their race?
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Temperature
• When you say that something is hot or cold, you are describing temperature.
• A thermometer is used to measure temperature.
• The base units of temperature are called degrees.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
Temperature
• Most people around the world and scientists measure temperature using the Celsius scale.
• Most people in the United States measure temperature using the Fahrenheit scale.
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Unit 1 Lesson 3 How Do Scientists Use Tools?
How Do You Care for Tropical Fish?
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Close Encounters
• To care for tropical fish, you must think like a scientist.
• Caring for public and home aquariums take similar skills: observing, inferring, measuring, and recording data.
Unit 1 Lesson 3 How Do Scientists Use Tools?
Keep Good Records
• Keeping good records in your science notebook is important.
• Making correct measurements is part of being a good scientist.
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Unit 1 Lesson 3 How Do Scientists Use Tools?